docs: def get_values(self, context_type):
          """
          Get the values valid on this line.
  
          :param context_type: "ENV" or "LABEL"
          :return: values of given type valid on this line
          """
          if context_type.upper() == "ENV":
              return self.envs
          elif context_type.upper() == "LABEL":
              return self.labels